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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

Lesson 2 Quiz: Rock Cycle, Minerals, Crystallography and Weathering

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  • Questions count: 10
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1.
Why is the genetic code described as 'degenerate' or 'redundant'?
One codon can code for multiple different amino acids.
The genetic code decays as the cell ages.
The genetic code differs completely between bacteria and humans.
Multiple different codons can code for the same single amino acid.
2.
The Cairo Monorail travels on an elevated single-beam track to avoid urban traffic ________.
stations
comfort
congestion
gardens
3.
The derivative of f(x) = 4 x3 - 5 x2 + 7 x - 9 with respect to x is:
f'(x) = 12 x2 - 10 x + 7
f'(x) = 12 x2 - 10 x
f'(x) = 4 x2 - 5 x + 7
f'(x) = 12 x3 - 10 x2 + 7
4.
Using the Quotient Rule, the derivative of y = (x + 3) / (x - 2) for x != 2 is:
5 / (x - 2)2
-5 / (x - 2)2
(2x + 1) / (x - 2)2
1 / (x - 2)2
5.
If f(x) = |x - 3|, the derivative f'(3) at x = 3:
Equals 1
Equals -1
Equals 0
Does not exist because the left-hand derivative (-1) does not equal the right-hand derivative (+1)
6.
The slope of the tangent to the curve y = (x + 1)/(x - 1) at x = 2 is:
-1
3
2
-2
7.
When examining a patient who suffers from severe weight loss, bulging eyes, rapid heart rate, and high temperature, the doctor diagnoses the condition as:
Myxedema
Dwarfism
Diabetic urine
Exophthalmos caused by excessive secretion of the hormone thyroxine
8.
Which of the following conditions leads to increased secretion of parathormone from the parathyroid glands?
High blood calcium level
Low level of ionized calcium in blood plasma
Low phosphate
Excessive vitamin D excess
9.
The major histocompatibility complex (MHC) protein associates within the macrophage cell with:
Histamine molecules
Perforin protein
Secreted antibodies
Microbe antigen after being broken down by lysosomal enzymes to be displayed on the external surface
10.
The Ancon breed mutation in sheep with short, arched legs is considered a mutation:
Harmful innovation
A useful mechanism that the breeder kept in mind to prevent sheep from jumping fences and damaging crops
Fatal to fetuses
Numerical chromosome
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